Contrast-induced nephropathy in elderly trauma patients

Area of Science:

• Nephrology
• Radiology
• Trauma Surgery

Background:

• Computed tomography (CT) scans utilize intravenous (IV) contrast, which carries a risk of nephrotoxicity.
• Elderly patients often have diminished renal function, increasing vulnerability to contrast-induced kidney injury.
• The study investigates the incidence of acute kidney injury (AKI) in elderly trauma patients receiving IV contrast.

Purpose of the Study:

• To determine the rate of acute kidney injury (AKI) in elderly trauma patients exposed to intravenous (IV) contrast during CT scans.
• To assess the association between IV contrast administration and AKI in this specific patient population.
• To evaluate the impact of AKI on patient outcomes, including mortality and length of stay.

Main Methods:

• Retrospective review of medical records for patients over 55 years old at a level-one trauma center (January 2003 - July 2008).
• Patients were grouped based on the administration of nonionic, isosmolar IV contrast.
• AKI was defined as a 25% relative or 0.5 mg/dL absolute increase in serum creatinine within 72 hours of presentation.

Main Results:

• Of 1,152 eligible elderly trauma patients, 96% underwent CT, with 71% receiving IV contrast.
• The overall incidence of AKI was 2.1%, with no significant difference between contrast (1.9%) and noncontrast (2.4%) groups.
• AKI within 72 hours was an independent risk factor for in-hospital mortality and prolonged length of stay.

Conclusions:

• Intravenous contrast media administration is not associated with an increased risk of AKI in elderly trauma patients.
• The development of AKI in this cohort is significantly linked to increased mortality and extended hospital stays.
• These findings suggest careful patient selection and monitoring for AKI in elderly trauma patients, irrespective of contrast exposure.